Full text
PDFPage 52
letter . 1999 Jan;92(1):52. doi: 10.1177/014107689909200124
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.